Debug Error: “Authentication Failed”
Here’s a small guide that guides you through solving the Authentication Failed issue when using the WooCommerce FedEx Shipping Plugin with Print Label. Read along.
After activating the FedEx plugin, everything works as it should for small orders. In other words, the customer only sees the Priority Mail rate. If I try an order for more than twenty books, instead of a drop-down menu, the customer is presented with a note that says “There are no shipping methods available. Please double check your address, or contact us if you need any help.”
With debug turned on, the FedEx response says that “Authentication Failed”. I configured your plugin with the same account number, password, keys, etc, by copying and pasting from the old plugin. But apparently, that did not work for the account authentication.
Authentication failed errors appear when the credentials are not correct. We request you to check the credentials in the plugin settings.
Note: If you are using test credentials, please make sure production key option is unchecked.